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PDF LA7565BM Data sheet ( Hoja de datos )
| Número de pieza | LA7565BM | |
| Descripción | IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products | |
| Fabricantes | Sanyo | |
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Hay una vista previa y un enlace de descarga de LA7565BM (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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Ordering number :EN5636
Monolithic Linear IC
LA7565B, 7565BM
IF Signal-Processing IC for PAL/NTSC Multi-System
Audio TV and VCR Products
Overview
The LA7565B/M is a PAL/NTSC multi-system audio
VIF/SIF signal-processing IC that adopts a minimal-
adjustment technique. The VIF circuit adopts a minimal-
adjustment technique in which AFT adjustment is made
unnecessary by VCO adjustment to simply end product
adjustment. The FM detector circuit uses PLL detections
to support multi-system audio detection. Since the
LA7565BM include an SIF converter on chip, it is easy to
implement multi-system audio. In addition, it also includes
a buzz canceller that suppresses Nyquist buzz to achieve
improved audio quality.
Functions
[VIF Block]
• Minimal adjustment PLL detector
• AFT
• RF AGC
• Equalizer amplifier
• SIF converter
[First SIF Block]
• First SIF detector
• Inter/split switch
• HPF
[SIF Block]
• PLL type FM detector
[Mute Block]
• AV mute
Package Dimensions
unit: mm
3067-DIP24S
[LA7565B]
unit: mm
3112-MFP24S
[LA7565BM]
Features
• Allows the use of a switch circuit to switch between
spilt and intercarrier operation.
• Improved buzz and buzz beat characteristics provided by
a PLL detector plus buzz canceller system.
• The IF AGC second filter is built in.
• PAL/NTSC multi-system audio can be implemented
easily.
• Adjustment-free circuit design that does not require AFT
and SIF coils.
SANYO: DIP24S
SANYO: MFP24S
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
83097HA(OT) No. 5636-1/16
1 page  
AC Characteristics Test Circuit
LA7565B, 7565BM
Test Circuit
Impedance
analyzer
No. 5636-5/16
5 Page 
Continued from preceding page.
Pin No.
Pin
LA7565B, 7565BM
Pin function
Output for the video signal that includes the SIF carrier.
10
Composite video output
To acquire adequate drive capabilities, a resistor must be
inserted between pin 10 and ground.
R ≥ 300 Ω
Equivalent circuit
11
12
VCO tank
This is the VCO tank circuit used for the video detector.
Refer to the coil specifications provided separately for more
information on the tank circuit. This VCO is a vector
synthesis VCO.
13 AFT output
The AFT center voltage is created by an external bleeder
resistor. The AFT gain increases as the value of this
external bleeder resistor is increased. Note that the value of
this resistor must not exceed 390 kΩ.
This circuit includes a control function that naturally brings
the AFT voltage to its center value under weak field
reception conditions.
14 RF AGC output
This output controls the tuner RF AGC.
There is a 200-Ω series protection resistor inserted in the
emitter output. Determine the value of the external bleeder
resistor based on the characteristics of the tuner used.
To tuner
Continued on next page.
No. 5636-11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LA7565BM.PDF ] | |
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